<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>键盘按键</title>
</head>
<body>
    <input type="text">
</body>
<script src="../jquery-3.6.3.js"></script>
<script>
    //$("input").keydown().keypress().keyup() 专业术语叫链式调用
    $("input").keydown(function(e1){
        //console.log(e1);
    }).keypress(function(e2){
        console.log(e2);//keypress无法监控功能案件
    }).keyup(function(){
        //松开按键事件
    })
</script>
</html>